| Title: |
Near-threshold states in coupled $DD^{\ast}-D^{\ast}D^{\ast}$ scattering from lattice QCD |
| Authors: |
Whyte, Travis; Wilson, David J; Thomas, Christopher E |
| Publisher Information: |
American Physical Society (APS); Department of Applied Mathematics and Theoretical Physics; //doi.org/10.1103/physrevd.111.034511 |
| Publication Year: |
2025 |
| Collection: |
Apollo - University of Cambridge Repository |
| Subject Terms: |
5106 Nuclear and Plasma Physics; 5107 Particle and High Energy Physics; 4902 Mathematical Physics; 49 Mathematical Sciences; 51 Physical Sciences |
| Description: |
The first determination of doubly-charmed isospin-0 coupled-channel $DD^\ast-D^\ast D^\ast$ scattering amplitudes from lattice QCD is presented. The finite-volume spectrum is computed for three lattice volumes with a light-quark mass corresponding to $m_π\approx 391$ MeV and is used to extract the scattering amplitudes in $J^P = 1^+$ via the Lüscher quantization condition. By analytically continuing the scattering amplitudes to complex energies, a $T_{cc}$ pole corresponding to a virtual bound state is found below $DD^\ast$ threshold. We also find a second pole, $T_{cc}^\prime$, corresponding to a resonance pole below the kinematically closed $D^\ast D^\ast$ channel, to which it has a strong coupling. A non-zero coupling is robustly found between the $S$-wave $D D^\ast$ and $D^\ast D^\ast$ channels producing a clear cusp in the $D D^\ast$ amplitude at the $D^\ast D^\ast$ threshold energy. This suggests that the experimental $T_{cc}^\prime$ should be observable in $D D^\ast$ and $D^\ast D^\ast$ final states at ongoing experiments. ; The Royal Society |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
English |
| Relation: |
https://www.repository.cam.ac.uk/handle/1810/381885 |
| Availability: |
https://www.repository.cam.ac.uk/handle/1810/381885 |
| Rights: |
Attribution 4.0 International ; https://creativecommons.org/licenses/by/4.0/ |
| Accession Number: |
edsbas.E555BAF2 |
| Database: |
BASE |